dennislau
Member level 1

To design a bandgap reference with standard CMOS technology, basically there are mainly two types of bandgap reference (with paraisitic bipolar transistor), one is use the op-amp type while another is use the current mirror/cascode mirror current mirror (without op-amp) type to generate the temperature, and supply-independent voltage. Which one is better against the process variation? And, does anyone suggest some topology which has good performance against the process variation or with accurate initial bandgap voltage without trimming?